Linux packet grabbing problem

how does linux centos7.6 crawl and view udp packets sent and received?

the communication between the platform and the device, the device that sends the package on the platform cannot be received, and the program has output before the platform is sent. I want to grab the package and look at the data.

Jun.28,2022

choose one of three:

  1. wireshark grab package
  2. tcpdump grab package input as pcap file, open
  3. with wireshark
  4. tcpdump directly observe the output
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1be32b5-31673.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1be32b5-31673.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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